The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

This futuristic German television spire is actually the world's largest digital clock.

A spitting ode to a German serial killer.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Each year, Germany's "City of Dragons" slays the world's largest walking robot.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

The last bastion of Roman presence north of the Alps looms over a German town.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Retirement home for giant obsolete machines.

This 600-year-old home seems to defy physics.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This "floating railway" is one of the world's oldest monorail systems.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Ruins of a German castle on top of a towering stone pillar.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."